VB程序如下：Dim a a = Array(1,2,3,4,5,6,7,8) i = 0 For k = 100 To

VB程序如下：Dim a a = Array(1,2,3,4,5,6,7,8) i = 0 For k = 100 To 90 Step -2
完全看不懂...要详解..
VB程序如下：
Dim a
a = Array(1,2,3,4,5,6,7,8)
i = 0
For k = 100 To 90 Step -2
s = a(i)^2
If a(i) > 3 Then Exit For
i = i + 1
Next k
Print k; a(i);s
上述程序的输出结果是（ ）.